1 X 1.5-8 DURCO STAINLESS STEEL CENTRIFUGAL PUMP Stock Number: P-1259 Mfg. Durco, The Durion Co Model 1 1/2×1-8/72 7.5 Hp, 3500 rpm, 230/460v, 3ph 1.5 x 1 inch in & out Rated for 10 gpm and 225 tdh, 275 psi @ 100 F Stainless Steel Alloy D4 (2) available Posted in Pump, Centrifugal.